Updating grub2 thru xubuntu installation:
nemesis is called thru grub2 on my installation. Instead of rebooting in xubuntu on sda1 to update grub after a change in mnt/sda1/etc/grub.d/40_custom in which nemesis is called in root mode (just copy paste the six lines tied by &&):

this is (one example of) where the arch wiki is unhelpful for anyone not using systemd (any reference to systemctl is a clue)
the gentoo wiki is more openrc friendly:https://wiki.gentoo.org/wiki/Ntp#ntpdate
for a one off:
$ sudo ntpdate pool.ntp.org
or
$ sudo ntpd -gq
and then if you want to sync the hardware clock
$ sudo hwclock -w
there is also a ntpd openrc service that could be enabled so that it runs at startup:
$ sudo rc-update add ntp-client default

re: scanner
looks like the driver needs to be built(which is problematic without a functioning devel.xzm)

[porteus brscan4]# yaourt -S brscan4
Unable to open file: /etc/pacman.d/mirrorlist-manjaro
Unable to open file: /etc/pacman.d/mirrorlist-manjaro
error: config file /etc/pacman.d/mirrorlist-manjaro could not be read: No such file or directory
[porteus brscan4]#

[porteus brscan4]# yaourt -S brscan4
Unable to open file: /etc/pacman.d/mirrorlist-manjaro
Unable to open file: /etc/pacman.d/mirrorlist-manjaro
error: config file /etc/pacman.d/mirrorlist-manjaro could not be read: No such file or directory

there is no longer any /etc/pacman.d/mirrorlist-manjaro
why yaourt is looking for it, i do not know..

yeah i've seen this sometimes , some time works sometimes doesn't, no ideas why .. yet..
it's worth remembering that pman installs by default, so if you are using a changes folder(i don't), it installs there..